638045278

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{1213}}^1\times {\mathrm{20231}}^1$

素因数の和:21459

約数の個数: 16

約数和(自身を含む): 1031589216

約数和(自身を除く): 393543938

約数列:

[1, 2, 13, 26, 1213, 2426, 15769, 20231, 31538, 40462, 263003, 526006, 24540203, 49080406, 319022639, 638045278]

約数ペア:

[(1, 638045278), (2, 319022639), (13, 49080406), (26, 24540203), (1213, 526006), (2426, 263003), (15769, 40462), (20231, 31538)]